Homer remarks that without his clown makeup on, Krusty looks just like him. This is because when Krusty was originally created, he and Homer were supposed to be the same person.
The term Coulrophobia is defined as the irrational fear of clowns.
According to the couch gag The Simpsons have aired a total of 636 episodes. Lisa quipped that the count is "four episodes early".
Jon Lovitz reprises his role as Llewelyn Sinclair, the theatrical director who first appeared in the episode "A Streetcar Named Marge," directing a musical version of 'A Streetcar Named Desire.' Here he is directing a new version of another famous American play, 'Death of a Salesman.'
The episode seems to be satirizing the Great Clown Scare of 2016, where sightings of Clowns in intimidating attire and poses were spotted across the United States.